Today Michael Kay has announced an update for the Saxon processor. The latest version for now is 9.1.
I've checked our saxon.extensions, and has fixed incompatibilities.
The source for the new version of the Saxon can be found at http://saxon.sourceforge.net/.
New features are discussed at: http://www.saxonica.com/documentation/changes/intro.html
Our extensions can be found at saxon.extensions.9.1.zip.
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